单项选择题
The power factor at which a paralleled AC generator operates is usually adjusted by the （）.
A.connected load
B.prime mover speed
C.field excitation
D.generators rated voltage
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相关考题
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单项选择题
If the resistance of a circuit is cut in half and the applied voltage is kept constant, the current flow will be （）.
A.doubled
B.quadrupled
C.unchanged
D.cut in half -
单项选择题
Equal power factors on paralleled AC generators are maintained by an automatic （）.
A.voltage regulator
B.reverse power relay
C.reverse current relay
D.governor control switch -
单项选择题
To equalize the power factor of two alternators operating in parallel, the （）
A.field excitation of both units is adjusted
B.governors of both units are adjusted
C.phase sequence is altered
D.kilowatt load is evenly divided
